Certified Rhythm Analysis Technician (CRAT) Practice Exam

Question: 1 / 400

What rhythm is characterized by being irregular, fast, and chaotic?

Multifocal atrial tachycardia

Supraventricular tachycardia

Atrial fibrillation with rapid ventricular response

Atrial fibrillation with rapid ventricular response is characterized by an irregularly fast and chaotic rhythm. In atrial fibrillation, multiple ectopic foci within the atria generate rapid and disorganized electrical impulses, which leads to the irregular and often rapid heartbeats seen on an ECG. Additionally, when there is a rapid ventricular response, the ventricles respond fast to these chaotic atrial impulses, resulting in a notable increase in heart rate.

This rhythm is distinct because of its irregularity, meaning that the intervals between heartbeats vary, and the chaotic nature reflects the unpredictable firing from multiple atrial sites. This can lead to symptoms such as palpitations, dizziness, or even more severe consequences like stroke due to blood clots forming in the atria. Understanding the nature of this rhythm is crucial for effective management and treatment strategies.

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Atrial flutter with a variable ventricular response

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